docs: def resolve_action(self, p_action_str, p_size=None):
          """
          Checks whether action specified in p_action_str is "built-in" or
          contains topydo command (i.e. starts with 'cmd') and forwards it to
          proper executing methods.
  
          p_size should be specified for some of the builtin actions like 'up' or
          'home' as they can interact with urwid.ListBox.keypress or
          urwid.ListBox.calculate_visible.
          """
          if p_action_str.startswith(('cmd ', 'cmdv ')):
              prefix, cmd = p_action_str.split(' ', 1)
              execute_signal = get_execute_signal(prefix)
  
              if '{}' in cmd:
                  self._execute_on_selected(cmd, execute_signal)
              else:
                  urwid.emit_signal(self, execute_signal, cmd)
          else:
              self.execute_builtin_action(p_action_str, p_size)